class Human:
    def __init__(self,age,appetite,blood,height,weight):
        self.age = age
        self.appetite = appetite
        self.blood = blood
        self.height = height
        self.weight = weight
    def eat(self,food_amount):
        print(f"The human eats {food_amount} units of food.")
    def sleep(self,hours):
        print(f"The human sleeps for {hours} hours")
    def celebrate(self):
        self.age += 1
        print(f"The human celebrates their birthday and is now {self.age} years old.")
    def grow(self):
        self.height += 1
        print(f"The human grows 1cm and is now {self.height}cm tall.")